<template>
     <el-container class="home-container" >
       <!-- 头部区域 -->
          <el-header>
            <div>
              <img src="../assets/backstage.png" alt="">
              <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
          </el-header>
          <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px' : '200px'" style="overflow-y: auto;">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu
                background-color="#545c64"
                text-color="#fff"
                active-text-color="#409BFF"
                :unique-opened="true"
                :collapse="isCollapse"
                :collapse-transition="false"
                :router="true"
                :default-active="activePath"
                >
                <!-- 一级菜单 -->
                <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                  <!-- 一级菜单模板区 -->
                    <template slot="title">
                      <!-- 图标 -->
                      <i :class="iconsObj[item.id]"></i>
                      <!-- 文本 -->
                      <span>{{item.authName}}</span>
                    </template>
                  <!-- 二级菜单 -->
                  <el-menu-item :index=" '/' + subItem.path " v-for="subItem in item.children"
                   :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                      <template slot="title">
                      <i class="el-icon-menu"></i>
                      <span>{{subItem.authName}}</span>
                    </template>
                  </el-menu-item>
                </el-submenu>

              </el-menu>
            </el-aside>
            <!-- 右侧主体区域 -->
            <el-main>
              <!-- 路由占位符 -->
              <router-view/>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
  data() {
    return {
      menulist:[],//左侧菜单数据
      iconsObj:{
        '125':'iconfont icon-users',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-hahahaha_huabanfuben',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiaoguanli'
      },
      isCollapse:false, //是否折叠
      activePath:''//激活链接地址
    };
  },
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    //退出处理
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //获取所有菜单
   async getMenuList(){
    const {data:res} = await this.$http.get('menus')
    if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
    this.menulist = res.data
    },
    //侧边栏的菜单的折叠和打开
    toggleCollapse(){
      this.isCollapse = !this.isCollapse
    },
    //保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  }
};
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-left: 5px;
  background-color: #373d41;
  > div {
    display: flex;
    align-items: center;
  }
  img {
    width: 40px;
    height: 40px;
  }
  span {
    color: #fff;
    font-size: 20px;
    margin-left: 15px;
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
